Solution:
Here is the given hint is
“the amount of liters of fuel spent on a trip, using a car that does 12 Km/L”
and “This way you can get distance”
And I have to take input spent 10 hours and average velocity 85km/h so the formula for how many litre fuel spent in this path is c=85*10/12 We actually got this by using unitary method đ
#include<iostream>
#include<cstdio>
int main()
{
double a,b,c;
scanf("%lf\n%lf",&a,&b);
c=(a*b/12);
printf("%.3lf\n",c);
return 0;
}